c++ - 如何附加 read_some 缓冲区？

Question

我有一些客户端 asio 代码使用 read_some() 直到读取了字节数。但是通过查看所有示例，我无法弄清楚如何将读取缓冲区组装成包含整个消息的更大缓冲区。我该怎么做？

boost::array<char, 4096> buf;
while (lnTotalBytesRead < BigMessageSize)
{
    size_t len = obj->socket_.read_some(boost::asio::buffer(buf), error);
    lnTotalBytesRead += len;
    // Need to append each received block into large block.
}

Answer 1

不要read_some，通过read一次读取整个缓冲区:

boost::array<char, BigMessageSize> buf;
boost::asio::read(obj->socket_, boost::asio::buffer(buf), error);